doc-src/IsarImplementation/Thy/Logic.thy

--- a/doc-src/IsarImplementation/Thy/Logic.thy	Mon Oct 11 21:05:01 2010 +0100
+++ b/doc-src/IsarImplementation/Thy/Logic.thy	Mon Oct 11 21:10:50 2010 +0100
@@ -619,7 +619,7 @@
   "d(\<alpha>\<^isub>i)"} for some @{text "\<alpha>\<^isub>i"} projected from @{text
   "\<^vec>\<alpha>"}.  Thus overloaded definitions essentially work by
   primitive recursion over the syntactic structure of a single type
-  argument.
+  argument.  See also \cite[\S4.3]{Haftmann-Wenzel:2006:classes}.
 *}
 
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